Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a40d811bf975dd51502e60ca2a185822ddf4f9263bf65e2385b2f22c11a8678e' 
  AND token = 'OSwgpPhvZ5owfajxOIOnZsKSxm0C4RaX9RsIpX5hZOc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}